draft-ietf-xrblock-rtcp-xr-delay-03.txt   draft-ietf-xrblock-rtcp-xr-delay-04.txt 
Audio/Video Transport Working Group G. Hunt Audio/Video Transport Working Group G. Hunt
Internet-Draft Unaffiliated Internet-Draft Unaffiliated
Intended status: Standards Track A. Clark Intended status: Standards Track A. Clark
Expires: October 23, 2012 Telchemy Expires: November 9, 2012 Telchemy
K. Gross K. Gross
AVA Networks AVA Networks
Q. Wu Q. Wu
Huawei Huawei
April 21, 2012 May 8, 2012
RTCP XR Report Block for Delay metric Reporting RTCP XR Report Block for Delay metric Reporting
draft-ietf-xrblock-rtcp-xr-delay-03.txt draft-ietf-xrblock-rtcp-xr-delay-04.txt
Abstract Abstract
This document defines an RTCP XR Report Block that allows the This document defines an RTCP XR Report Block that allows the
reporting of Delay metrics for use in a range of RTP applications. reporting of Delay metrics for use in a range of RTP applications.
Status of this Memo Status of this Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
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Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on October 23, 2012. This Internet-Draft will expire on November 9, 2012.
Copyright Notice Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
5.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 9 5.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 9
5.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 9 5.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 9
5.3. Contact information for registrations . . . . . . . . . . 9 5.3. Contact information for registrations . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 10 6. Security Considerations . . . . . . . . . . . . . . . . . . . 10
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 11 7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 11
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1. Normative References . . . . . . . . . . . . . . . . . . . 12 8.1. Normative References . . . . . . . . . . . . . . . . . . . 12
8.2. Informative References . . . . . . . . . . . . . . . . . . 12 8.2. Informative References . . . . . . . . . . . . . . . . . . 12
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 13 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 13
A.1. draft-ietf-xrblock-rtcp-xr-delay-03 . . . . . . . . . . . 13 A.1. draft-ietf-xrblock-rtcp-xr-delay-04 . . . . . . . . . . . 13
A.2. draft-ietf-xrblock-rtcp-xr-delay-02 . . . . . . . . . . . 13 A.2. draft-ietf-xrblock-rtcp-xr-delay-03 . . . . . . . . . . . 13
A.3. draft-ietf-xrblock-rtcp-xr-delay-01 . . . . . . . . . . . 13 A.3. draft-ietf-xrblock-rtcp-xr-delay-02 . . . . . . . . . . . 13
A.4. draft-ietf-xrblock-rtcp-xr-delay-00 . . . . . . . . . . . 13 A.4. draft-ietf-xrblock-rtcp-xr-delay-01 . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14 A.5. draft-ietf-xrblock-rtcp-xr-delay-00 . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction 1. Introduction
1.1. Packet Delay Metrics Block 1.1. Packet Delay Metrics Block
This draft defines a new block type to augment those defined in This draft defines a new block type to augment those defined in
[RFC3611] for use in a range of RTP applications. The new block type [RFC3611] for use in a range of RTP applications. The new block type
supports the reporting of the mean, minimum and maximum values of the supports the reporting of the mean, minimum and maximum values of the
network round-trip delay between RTP interfaces in peer RTP end network round-trip delay between RTP interfaces in peer RTP end
systems as measured, for example, using the RTCP method described in systems as measured, for example, using the RTCP method described in
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"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119]. document are to be interpreted as described in RFC 2119 [RFC2119].
3. Delay Block 3. Delay Block
Metrics in this block report on packet delay in the stream arriving Metrics in this block report on packet delay in the stream arriving
at the RTP system. Instances of this Metrics Block refer by SSRC to at the RTP system. Instances of this Metrics Block refer by SSRC to
the separate auxiliary Measurement Information block [MEASI] which the separate auxiliary Measurement Information block [MEASI] which
contains measurement intervals. This metric block relies on the contains measurement intervals. This metric block relies on the
measurement interval in the Measurement Information block indicating measurement interval in the Measurement Information block indicating
the span of the report. If the measurement interval is not received the span of the report and should be sent in the same compound RTCP
in the same compound RTCP packet as this metric block, this metric packet as the measurement information block. If the measurement
block should be discarded. interval is not received in the same compound RTCP packet as this
metric block, this metric block should be discarded.
3.1. Report Block Structure 3.1. Report Block Structure
Delay metrics block Delay metrics block
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=NDEL | I | resv. | block length = 6 | | BT=NDEL | I | resv. | block length = 6 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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[Note to RFC Editor: please replace NDEL with the IANA provided [Note to RFC Editor: please replace NDEL with the IANA provided
RTCP XR block type for this block.] RTCP XR block type for this block.]
Interval Metric flag (I): 2 bit Interval Metric flag (I): 2 bit
This field is used to indicate whether the Delay metrics are This field is used to indicate whether the Delay metrics are
Sampled, Interval or Cumulative metrics, that is, whether the Sampled, Interval or Cumulative metrics, that is, whether the
reported values applies to the most recent measurement interval reported values applies to the most recent measurement interval
duration between successive metrics reports (I=10) (the Interval duration between successive metrics reports (I=10) (the Interval
Duration) or to the accumulation period characteristic of Duration) or to the accumulation period characteristic of
cumulative measurements (I=11) (the Cumulative Duration) or to the cumulative measurements (I=11) (the Cumulative Duration) or is a
value of a continuously measured or calculated that has been sampled instantaneous value (I=01) (Sampled Value).
sampled at end of the interval (I=01) (Sampled Value).
Reserved (resv): 6 bits Reserved (resv): 6 bits
These bits are reserved. They MUST be set to zero by senders and These bits are reserved. They MUST be set to zero by senders and
SHOULD be ignored by receivers. SHOULD be ignored by receivers.
block length: 16 bits block length: 16 bits
The length of this report block in 32-bit words, minus one. For The length of this report block in 32-bit words, minus one. For
the Delay block, the block length is equal to 6. the Delay block, the block length is equal to 6.
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ID draft-ietf-avtcore-monarch-12, April 2012. ID draft-ietf-avtcore-monarch-12, April 2012.
[RFC6390] Clark, A. and B. Claise, "Framework for Performance Metric [RFC6390] Clark, A. and B. Claise, "Framework for Performance Metric
Development", RFC 6390, October 2011. Development", RFC 6390, October 2011.
Appendix A. Change Log Appendix A. Change Log
Note to the RFC-Editor: please remove this section prior to Note to the RFC-Editor: please remove this section prior to
publication as an RFC. publication as an RFC.
A.1. draft-ietf-xrblock-rtcp-xr-delay-03 A.1. draft-ietf-xrblock-rtcp-xr-delay-04
The following are the major changes to previous version :
o Revise the definition of sampled metric to get alignment with
MONARCH.
o Clarify sending the metric block in the same RTCP compound packet
as the measurement information block.
A.2. draft-ietf-xrblock-rtcp-xr-delay-03
The following are the major changes to previous version : The following are the major changes to previous version :
o Allocate 64 bit for end system delay and represent it using 64 bit o Allocate 64 bit for end system delay and represent it using 64 bit
NTP-Timestamp. NTP-Timestamp.
o Other editorial changes. o Other editorial changes.
A.2. draft-ietf-xrblock-rtcp-xr-delay-02 A.3. draft-ietf-xrblock-rtcp-xr-delay-02
The following are the major changes to previous version : The following are the major changes to previous version :
o Allocate 32bits for each metrics and change unit for each metric o Allocate 32bits for each metrics and change unit for each metric
from ms to 1/65536 seconds. from ms to 1/65536 seconds.
A.3. draft-ietf-xrblock-rtcp-xr-delay-01 A.4. draft-ietf-xrblock-rtcp-xr-delay-01
The following are the major changes to previous version : The following are the major changes to previous version :
o Updated references. o Updated references.
o Allocate one more bit for Interval metric flag to indicate sampled o Allocate one more bit for Interval metric flag to indicate sampled
metric can be used. metric can be used.
o add a few clarification text for failure mode. o add a few clarification text for failure mode.
A.4. draft-ietf-xrblock-rtcp-xr-delay-00 A.5. draft-ietf-xrblock-rtcp-xr-delay-00
The following are the major changes to previous version : The following are the major changes to previous version :
o Changed BNF for SDP following Christian Groves' and Tom Taylor's o Changed BNF for SDP following Christian Groves' and Tom Taylor's
comments (4th and 5th May 2009). comments (4th and 5th May 2009).
o Updated references. o Updated references.
Authors' Addresses Authors' Addresses
 End of changes. 11 change blocks. 
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